Upcoming CFD Workshops

Pointwise is heavily involved in planning and preparation for two AIAA workshops coming this summer held the weekend before AIAA Aviation in Denver. We are generating families of meshes to be provided to participants in the 3rd CFD High Lift Prediction Workshop. And we are helping organize the 1st Geometry and Mesh Generation Workshop.

CFD High Lift Prediction Workshop

This summer's 3rd CFD High Lift Prediction Workshop (HiLiftPW-3) is the latest in a successful series that began in 2010 followed by a second event in 2013. The workshop's goal remains the same over time: to assess the numerical predication capability of current-generation CFD (computational fluid dynamics) technology for swept, medium- to high-aspect ratio wings for landing and take-off configurations. Outcomes sought are guidelines for modeling these high-lift flow fields, identifying critical physics therein, and enhancing CFD capabilities. This year's event focuses on two configurations: NASA's High Lift Common Research Model (HL-CRM) and the JAXA Standard Model (JSM). A third test case involves a turbulence model study of a 2-D airfoil.

JAXA Standard Model

The JSM (Figure 1) is intended for a study of the nacelle installation by simulating the flowfield with slat and flap deployed and with and without the nacelle and pylon. Experimental data is available for comparison. Several angles of attack are to be simulated at a Mach number of 0.172 and a Reynolds number slightly below 2 million.

High Lift Common Research Model

The HL-CRM (Figure 2) is an update to NASA's CRM as used for the Drag Prediction Workshops. The HL-CRM test case for HiLiftPW-3 is intended for a grid convergence study because experimental data has not yet been collected for this configuration. Grids of varying resolution (coarse, medium, fine, and extra fine) will be provided to participants for their use. For HiLiftPW-3, the slat and flaps are not attached to the wing.

Figure 2: The NASA High Lift Common Research Model viewed from below (geometry model imported from IGES into Pointwise).

Plans are already underway for a wind tunnel test of the HL-CRM for HiLiftPW-4. The geometry model for this case will obviously include attach hardware for the slats and flaps and other components such as pylon and nacelle.

Geometry and Mesh Generation Workshop

The 1st AIAA Geometry and Mesh Generation Workshop (GMGW-1) is being sponsored by the Meshing, Visualization, and Computational Environments (MVCE) technical committee. The idea for this new workshop arose out of NASA's CFD Vision 2030 Study in which mesh generation was cited as one of the main impediments on the road to achieving NASA's CFD goals by the year 2030. MVCE decided to take ownership of that challenge and GMGW-1 is intended as the first milepost along that road.

The objectives of GMGW-1 are to assess the current state-of-the-art in geometry preprocessing and mesh generation technology, to identify and develop understanding of areas where improvement is needed, and to document best practices.

With the cooperation of the HiLiftPW-3 organizers (for which MVCE is very thankful), data will be collected on the process and tools used to generate the families of meshes for the HL-CRM. This data is to include labor hours for various components of the process, tools used, and computational resources consumed. MVCE members are generating families of baseline meshes to be provided to HiLiftPW-3 participants. Particpants who generate their own meshes for HiLiftPW-3 are asked to also submit data on their meshing process for collation and presentation at GMGW-1.

Because of the closely related subject matter of the two workshops, one registration fee provides access to both.

For More Information

We encourage CFD practioners of all levels to participate in one or both workshops. AIAA's prior CFD workshops have all been successful in helping advance the start-of-the-art through data collection and analysis but also the sharing and compilation of best practices. We hope that GMGW-1 will be the first step for doing the same for mesh generation.

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